CUED Publications database

The prediction of hot streak migration in a high-pressure turbine

Ong, J and Miller, RJ and Denton, JD (2010) The prediction of hot streak migration in a high-pressure turbine. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 224. pp. 119-128. ISSN 0957-6509

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Abstract

Accurate predictions of combustor hot streak migration enable the turbine designer to identify high-temperature regions that can limit component life. It is therefore important that these predictions are achieved within the short time scales of a design process. This article compares temperature measurements of a circular hot streak through a turning duct and a research turbine with predictions using a three-dimensional Reynolds-averaged Navier-Stokes solver. It was found that the mixing length turbulence model did not predict the hot streak dissipation accurately. However, implementation of a very simple model of the free stream turbulence (FST) significantly improved the exit temperature predictions on both the duct and research turbine. One advantage of the simple FST model described over more complex alternatives is that no additional equations are solved. This makes the method attractive for design purposes, as it is not associated with any increase in computational time.

Item Type: Article
Uncontrolled Keywords: Combustor High-pressure turbine Hot streaks Mixing Turbulence modelling
Subjects: UNSPECIFIED
Divisions: Div A > Turbomachinery
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:14
Last Modified: 08 Dec 2014 02:35
DOI: 10.1243/09576509JPE804